<template>
  <view>
    <my-search @click="gotoSearch"></my-search>
  <view class="scroll-view-container">
    <scroll-view  scroll-y="true" :style="{height:wh+'px'}" class="left-scroll-view">
    <block v-for="(item,i) in cateList" :key="i"> 
     <view :class="['left-scroll-view-item',i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>  
  
     </block>
 

      
    </scroll-view>

    <scroll-view scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
    <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
      <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
        <view class="cate-lv3-list">
          <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
            <image :src="item3.cat_icon" mode=""></image>
            <text>{{item3.cat_name}}</text>
          </view>
        </view>
      
    </view>
    </scroll-view>
  </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        wh:0,
        cateList:[],
        active:0,
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad() {
     const sysInfo= uni.getSystemInfoSync()
     this.wh=sysInfo.windowHeight-50
     this.getCateList()
    },
    methods:{
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      },
      async getCateList(){
         const{data:res}= await uni.$http.get('/api/public/v1/categories')
            if(res.meta.status!==200) return uni.$showMsg()
            this.cateList=res.message
            this.cateLevel2=res.message[0].children
         uni.$showMsg('数据请求成功')
       },
       activeChanged(i){
         this.active=i
         this.cateLevel2=this.cateList[i].children
         this.scrollTop=this.scrollTop===0?1:0
       },
       gotoGoodsList(item){
         uni.navigateTo({
           url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
         })
       }
    }
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;  
    .left-scroll-view-item{
    background-color: #F7F7F7;
    line-height: 60px;
    text-align: center;
    font-size: 12px;
    &.active{
    background-color: #FFFFFF;
    position: relative;
    &::before{
      content: '';
      display: block;
      width: 3px;
      height: 30px;
      background-color: #C00000;
      position: absolute;
      top: 50%;
      left: 0;
      transform: translateY(-50%);
    }
  }
  }
  }

  
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px;
}
.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    margin-bottom: 10px;
    width: 33.33%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
